<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>

    <div id="app">
        <h3>{{firstName + ' ' +lastName}}</h3>
        <h3>{{firstName}} {{lastName}}</h3>
<!-- 方法 -->
        <h3>{{getFullName()}}</h3>
<!-- 计算属性 直接写不用写小括号的--> 
        <h2>{{fullName}}</h2>
        {{message}}
    </div>
    <script src="../js/vue.js"></script>
    <script>
        const app = new Vue({
            el:'#app',
            data:{
                message:'你好呀！',
                firstName:'wang',
                lastName:'ting'
            },
            methods:{
                getFullName(){
                    return this.firstName + ' ' +this.lastName
                }
            },
            computed:{
                fullName: function(){
                    return   this.firstName + ' ' +this.lastName
                }
                
            }
        })
    </script>
</body>
</html>